Pressure-regulator.



N0..802,580. YATENTED OCT. 24, 1905.

J. D. MOFFETT.

PRESSURE REGULATOR.

APPLICATION IILBD mm2, 1905.

mi ,11 IIIIWIIIIIIII .ill

Witnesses 6m,

JAMES .I). MOFFETT, OF LU'FKIN, TEXAS.

PRESSURE-REGULATOR.

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed March 2, 1905. Serial No. 248,181.

To ULZZ whom, t muy concern.'

Be it known that l', J AMns D. MoFFETT,a citi- Zen of the United States, residing at Lufkin, in the county of Angelina and State of Texas, have invented a new and useful Pressure-Regulator, of which the following is a specification.

This invention relates to devices for automatically regulating the pressure of steam, compressed air, or other gases while passing through a conduit, and has for its object to simplify and improve theconstruction and increase the efliciency and accuracy of devices of this class.

With this and other objects in View, which will appear as the nature of the invention is better understood, the same consists in certain novel features of construction, as hereinafter fully described and claimed.

In the accompanying drawing', forming a part of this specification, and in which corresponding parts are denoted by like designating characters, is illustrated the preferred form of embodiment of the invention capable of carrying the same into practical operation, it being understood that the invention is not necessarily limited thereto, as various changes in the shape, proportions, and general assemblage of the parts may be resorted to without departing from the principle of the invention or sacrificing any of its advantages.

ln the drawing the figure is a side elevation, partially in section, of the improved device applied.

rlhe improved device comprises a conduit, such as the sup ply-pipe for a steam-engine or like apparatus or any form of conduit through which a medium for producing pressure is caused to pass, and for the purpose of illustration a conventional form of a conduit of this character is represented at 10, with a throttle-valve 11 connected therein and with the conduit terminating in a receiver, such as the steam-chest of a steam-engine, as at 12. Connected into the conduit between the throttlc-valve 11 and the terminal at 12 is a governor-valve 18 of conventional form and provided with a lateral arm 14:, extending from its stem 15. Connected at 16 to the conduit 10 between the governor-valve and the terminal at 12 is acylinder 17, having' a plunger 18 movable longitudinally therein. A piston-rod 19 is pivoted at the ends, respectively, to the plunger 18 and valve-stem crank-arm 14 to secure the requisite flexibility between the parts, so that the plunger will move freely and without cramping. A controlling-valve 2O is connected between the conduit 1() and the cylinder 17, and a spring 21 is connected between the governorvalve arm 111 and some stationary portion of the structure, preferably to the connection 16, to maintain the arm 111 yieldably in depressed position or with the governor-valve open and the plunger 18 at the inner end of its stroke.

With a device thus constructed and connected into a conduit between the source of supply and the apparatus to be operated the pressure is effectually controlled and regulated and a uniformity of speed maintained.

The operation of the device is as follows: The valve 2O is closed and the throttle-valve 11 opened until the requisite speed is attained. The valve 2O is then gradually opened until the pressure-producing medium has moved the plunger 18 far enough to close the governor-valve until the pressure is equalized. The throttle-valve 11 is then fully opened, and the pressure will thereafter be efectually regulated and rendered uniform by the coaction of the plunger operated upon by the pressure medium and the governor-valve, any increase of pressure instantly closing the governor-valve to an extent corresponding to the increase, and any decrease of pressure instantly opening the governor-valve to an extent corresponding to the decrease, the speed being thus effectually controlled and rendered uniform no matter what changes in the pressure may occur at the source of supply. The speed may be quickly and easily increased by slightly increasing the opening of the valve 20, and as quickly and easily decreasing the speed by slightly decreasing the opening of the valve, and to insure this adjustment the port of the valve 2O should be large enough or larger than enough to permit suiiicient of the pressure medium to pass therethrough to produce the highest required speed, and then any required. speed less than the highest may be secured by simply manipulating the single valve 20. The valve 20 is thus a very important feature of the invention and adds materially to the value and eiiiciency of the invention. The pivoting of the ends of the rod 19 respectively to the piston or plunger 18 and to the valve-arm 14 is also an important feature of the invention, as any tendency to cramping between the parts 'is obviated and the requisite lliexibility between the parts insured.

The device is simple in construction, can be IOO ITO

readily attached to any apparatus in which steam, compressed air, or other gas or iiuid is employed under pressure and in which it is required to regulate or control the same.

Any suitable form of governor-valve may be employed, and the invention is not, therefore, to be limited to any specific form of valve.

YVith some forms of apparatus a weight or similar power might be substituted for the spring' 21; but it is obvious that this would not be a departure from the principle of the invention. as the same results would be produced in substantially the same manner.

Having thus described the invention, what is Claimed isvl. A pressure-regulator, comprising a conduit for the pressure-producing medium, a governor-valve connected into said conduit, a Cylinder having' a plunger operating therein and connected to said conduit between said governor-valve and the outlet end of the conduit, a controlling-valve between said cylinder and conduit, and a piston-rod between said plunger and the operating-arm of said governor-valve.

2. A pressure-regulator, comprising a conduit for the pressure-producing medium, a governor-valve connected into said conduit, a i Cylinder having' a plunger operating therein l and connected to said Conduit between said governor-valve and the outlet end ot' the Conduit, a controlling-valve between said Cylinder and conduit, a piston-rod between said plunger and the operating-arm of said governor-valve, and a spring connected to maintain said governor-valve yieldably in open position and said plunger yieldably in withdrawn position.

3. Inapressure-regulator, a conduit for the pressure-producing medium, a governor-valve Connected into said conduit and provided with a crank-arm leading from its valve-stem, a Cylinder open at one end and connected at the other end to said Conduit between said governor-valve and the outlet end of the conduit, a plunger operating in said Cylinder, a rod pivoted at the ends respectively to said plunger and crank-arm, and a spring' connected between said Cylinder Connections and said crank-arm.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JAMES D. MOFFET'I.

Vitnesses:

J. J. SINGLETON, SARA WV. Gonne. 

